Improvement in looms



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Letters Parent No. 80,810, ma August 11,1868.

IMPROVEMENT IN LOOMS.

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TO ALL WHOM I'l MY CONCERNE Bc it known that I, GEORGE CROMPTON, of tbccity and county of Worcester, and State of Massachusetts, have inventedan Improvement in Looms; and I do hereby declare that the following,taken in connection with the drawings which accompany and `forn1 part ofthis specification, is a description of my invention suicient to enablethose skilled inthe art to'practise it.

My inventionV relates particularly to the lifter, depresser, andevner-mechanism of that class of looms employing upright hooked' jaclgsfor changing the harness-frames to produce the successive shed, and tothat class of lifter and depresser-levcrs which are inclined (when theshed is formed) to bring the jacks and through them the harness-framesinto position to form an even shed in the path of the shuttle.

My improvement consists in making each lifter, depresser, and evener-baras a bent lever, or with a vertical arm projecting from the leverproper, `the verticalarm carrying a pin which slides in or against agroove or incline'as the-levers rise o'r fall, the inclination -of thegroove imparting a lateral movement of the arm, whichproduces acorresponding movement of the horizontal lever or bar, and therebyeffects the required linclination of the lifter, depresser, or evcner. Y

The drawing represents anend elevation of a loom-frame, upon which myinvention is shown as embodied.

The detail view shows an end elevation of the jack-mechanism. d

a denotes the loom-frame, b the lathe-shaft, c the upper and d the'lower harness-levers, between and to the inner ends of which theharness-fra`me`s are strung. Y l

e denotes the upright jacks, `shown as jointed at top directly totheouter ends ofthe upper harness-levers, and as strung, at their lowerends, to the outerends of the levers di On the front and rear sides ofeach jack-plate, e, is a hook, which engages either with a lifter-hanf,or a depresser-bar, g, accordingly as it is thrown into connection witheither bar by the pattern-cylindervor chain, or out of normal engagementwith the lifter-bar and into connection with the depresser, when thejacks are strung by inclined cording, which holds the jackdlooksnormally upon the lifter.

One end of each lifter and depresser-bar is free, (excepting that itfisconnected to the corresponding evenerbar,) and traverses in a slot ina.bracket,j, while the opposite end thereof is hung by a fulcrun1-pin,'c, to an arm, z'or h', xed to the slide-rod a' or t", the slide-rodsbeing actuated to raise and depress the levers from cranks on thelathe-shaft 6.

From this end of each evener, lifter, and depresser-bar, a vertical arm,Z, projects, such arm carrying a pin, m, which extends into or against agroove or incline, n, in a plate, o, .fixed to a stationary bracket, p.

Each groove, n, is inclined, as selen in thedrawing, and thisinclination causes each lever to be swung from' its horizontal positioninto an inclined position, as it is elevated or depressed, therebyproducing theinclinati-on in the series of harness-hooks necessary forthe proper disposition of' the shed.

Each incline plate, o, is mounted en a ccntre-pinfg, and has anadjusting-slot and screw, 1', through which the inclinationof the slotmay be adjusted in accordance with the arrangement'of theharness-frames.

I claim, in combination with the harness-levers operated by hookedjacks, angular lifter and depresserlevers, the inclination in which iseffected by pins or projections from arms, l, working in or againstinclines, n, substantially as described. l Y

I also claim the eveners, in combination with the inclines, constructedsubstantially as described, for producing the inclination of theevcncr-lcvers:

I also claim the adjustable inclines for varying the extent ofinclination of the levers, substantially as described.

GEO. CROMPTON.

Witnesses:

IIonAcn WYMAN, J. A. WARE.

